Function expand_one_token

scripts/config/preprocess.c:575–578

* Expand variables in a token. The parsing stops when a token separater * (in most cases, it is a whitespace) is encountered. 'str' is updated to * point to the next character. * * The returned string must be freed when done. */

 * The returned string must be freed when done.
 */
char *expand_one_token(const char **str)
{
	return __expand_string(str, is_end_of_token, 0, NULL);
}